The Meinl Planetary Tuned Sedna Gong 28"/71cm has a resonate frequency of 181.60Hz (F2#) on a A4=431.92Hz scale. The Meinl planetary gongs are made in Germany. Using the calculations of Hans Cousto (The Cosmic Octave) to match the frequencies of the sun, moon, and planets, each gong is tuned to produce the corresponding frequency.